Specifications
5-20
Fuse Cover with Indicator Light
A fuse cover with indicator light is fitted over each fuse. The indicator lights are
illuminated only when a fuse is blown. Three spare fuses are shipped with the system
inside the enclosure.
5.8.1 Description of the electrical protection module
The EPD has six LED indicators that display the existing status and any faults that have
occurred. Up to 10 faults can be stored in the EPD’s memory. The 11
th
fault causes the
first to be removed from memory. Only the ten most recent faults are retained. Power is
not required to maintain memory. Instructions on how to read and/or clear the fault
memory are printed on the EPD.
The five adjustable settings on the EPD have been preset and tested at the factory.
Cryomech does not recommend changing any of the settings. The settings are as
follows:
UNBALANCE – 2.8%
TRIP DELAY – 5 seconds
AUTO RESTART DELAY – 5 minutes
SELECTOR – Auto Restart W/Delay
LINE VOLTAGE – Setting should match voltage rating on the helium compressor label.
If the EPD senses a fault when the LNP is operating, the system will be automatically
shut down and the 5-minute restart time delay will begin.
Both the Output On and Reading Memory indicators will “Slow Flash”.
The system cannot be restarted during the 5-minute delay.
Should the fault be corrected at the end of the restart delay, the EPD will automatically
restart the LNP after a 3-15 second random start delay. The Output On indicator will
“Fast Flash” during the random start delay.
Once the system starts, the Output On indicator will be “Steady On”. The fault will be
stored in the EPD’s memory and the Reading Memory indicator will “Slow Flash”.
26Apr07
Содержание LNP-40
Страница 1: ...Model LNP 40 Liquid Nitrogen Plant INSTALLATION OPERATION and ROUTINE MAINTENANCE MANUAL...
Страница 4: ...1 1 N Section 1 Overview...
Страница 10: ...2 1 N Section 2 Warranty...
Страница 13: ...3 2 N Section 3 Safety...
Страница 25: ...4 1 N Section 4 Inspection and Unpacking...
Страница 29: ...5 3 N Section 5 Specifications...
Страница 50: ...6 1 N Section 6 Installation...
Страница 67: ...7 2 N Section 7 Operation...
Страница 87: ...8 1 N Section 8 Routine Maintenance...
Страница 98: ...Appendix Spray Lubricant Instructions...